unveil_lookup
(void) unveil_lookup(parent, p->p_p, &ret);
if ((uv = unveil_lookup(vp, pr, NULL)) != NULL) {
uv = unveil_lookup(dp, pr, NULL);
uv = unveil_lookup(dp, pr, NULL);
uv = unveil_lookup(ni->ni_vp, pr, NULL);
uv = unveil_lookup(ni->ni_dvp, pr, NULL);
if ((uv = unveil_lookup(vp, pr, NULL)) != NULL &&
struct unveil *unveil_lookup(struct vnode *, struct process *, ssize_t *);